Sorry for the double post, but I fixed my problem! What I did first was create a test profile with only the Soolie Mod and the official DLC installed, then I ran the spears patcher which only had those files as a master. After the spears patch, I then enabled the Lost Tribes mod. Then I created a compatibility patch in the Creation Kit which resolved manually to create the custom spear races and convert spear and javelin weapons.
So far converting the predator weapons has been an almost complete success. The animations work with the standard races for both spears and javelins. Unfortunately, I'm having the "floating head" glitch for my custom spear races, but there are fixes for that.
Thanks for the help! I'm not being facetious, at least there were people on this forum that heard me out and tried to help.
